Film Capacitors

Part Number	Description / PDF	Quantity
ECW-FG2J225JA Panasonic	CAP FILM 2.2UF 5% 630VDC RADIAL	500
ECQ-E2225JB Panasonic	CAP FILM 2.2UF 5% 250VDC RADIAL	944
ECW-F6203HL Panasonic	CAP FILM 0.02UF 3% 630VDC RADIAL	283
ECQ-E4274JFW Panasonic	CAP FILM 0.27UF 5% 400VDC RADIAL	0
ECW-U1153KC9 Panasonic	CAP FILM 0.015UF 10% 100VDC 1913	6886
ECQ-E2334JFW Panasonic	CAP FILM 0.33UF 5% 250VDC RADIAL	0
ECQ-E4153KF3 Panasonic	CAP FILM 0.015UF 10% 400VDC RAD	0
ECW-FD2W224KQ Panasonic	CAP FILM 0.22UF 10% 450VDC RAD	1123
ECW-HC3F103JD Panasonic	CAP FILM 10000PF 5% 3KVDC RADIAL	2
ECW-FE2J684KA Panasonic	CAP FILM 0.68UF 10% 630VDC RAD	0
ECQ-E6823RJF Panasonic	CAP FILM 0.082UF 5% 630VDC RAD	0
ECH-U1H103GX5 Panasonic	CAP FILM 10000PF 2% 50VDC 1206	65819
ECQ-UBAF474MA Panasonic	CAP FILM 0.47UF 20% 300VAC RADIA	0
ECQ-E4123JFB Panasonic	CAP FILM 0.012UF 5% 400VDC RAD	0
ECQ-E2105KF3 Panasonic	CAP FILM 1UF 10% 250VDC RADIAL	0
ECW-F4474JB Panasonic	CAP FILM 0.47UF 5% 400VDC RADIAL	281
ECH-U1224GCV Panasonic	CAP FILM 0.22UF 2% 100VDC 2825	924
ECQ-E1684JF Panasonic	CAP FILM 0.68UF 5% 100VDC RADIAL	290
ECW-U4223V17 Panasonic	CAP FILM 0.022UF 5% 400VDC 2416	3429
ECQ-E4123RKF Panasonic	CAP FILM 0.012UF 10% 400VDC RAD	0

Film Capacitors

1. Overview

Film capacitors are a type of electronic component using plastic films (e.g., polypropylene, polyester) as dielectric materials. They are non-polarized capacitors with high insulation resistance, low loss, and excellent long-term stability. These capacitors play critical roles in power electronics, automotive systems, renewable energy, and consumer devices due to their reliability and high voltage-handling capabilities.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Polyester (PET)	Low cost, compact size, moderate temperature stability	General-purpose circuits, consumer electronics
Polypropylene (PP)	High voltage resistance, low dielectric loss, excellent thermal stability	Power supplies, motor drives, EV charging systems
Polycarbonate (PC)	High precision, low moisture absorption	Medical devices, aerospace instrumentation
Polyphenylene Sulfide (PPS)	High-temperature endurance, flame retardant	Automotive electronics, industrial automation
Polyimide (PI)	Ultra-high temperature resistance (up to 200 C), compact design	Aviation systems, downhole drilling equipment

3. Structure and Composition

Film capacitors typically consist of metalized plastic films wound or stacked into a cylindrical/rectangular core. The dielectric thickness ranges from 1-10 m, with electrode materials like zinc or aluminum. The assembly is encapsulated in epoxy resin or plastic housings. Key structural elements include:

Dielectric layer (plastic film)
Metallized electrode patterns
Termination electrodes (sprayed metal contacts)
Protective outer coating

4. Key Technical Parameters

Parameter	Description	Importance
Capacitance Range	0.1 nF - 100 F	Determines energy storage capacity
Rated Voltage	50 V - 10 kV	Defines operational safety limits
Capacitance Tolerance	1% to 20%	Affects circuit precision
Dissipation Factor	0.0001 - 0.05	Indicates energy efficiency
Insulation Resistance	10^9 - 10^12	Reflects leakage current performance
Operating Temperature	-55 C to +155 C	Dictates environmental adaptability
Temperature Coefficient	50 to 400 ppm/ C	Impacts stability under thermal stress
Stability	C/C < 2% over 10 years	Long-term reliability indicator

5. Application Fields

Main industries and equipment:

Power electronics: AC/DC converters, frequency inverters
Automotive: Electric vehicle (EV) on-board chargers, battery management systems
Consumer electronics: LED lighting, plasma TVs
Industrial: Uninterruptible power supplies (UPS), welding machines
Renewable energy: Solar inverters, wind turbine converters

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
TDK Corporation	B32656 series	PP film, 480 F/1200 V for industrial inverters
KEMET	C4AZ-X7R4U3D106KE	Automotive-grade DC link capacitor
AVX	6TP105K	Tantalum polymer hybrid for aerospace
Vishay	MKP1848 series	Self-healing PP technology

7. Selection Guidelines

Key considerations:

Determine required capacitance and voltage ratings with safety margins
Assess environmental conditions (temperature, humidity, vibration)
Evaluate dielectric absorption and frequency response requirements
Consider packaging constraints (through-hole vs. surface-mount)
Analyze cost-performance trade-offs for mass production

8. Industry Trends

Emerging trends include: development of high-power-density capacitors for EVs, adoption of nanodielectric materials for improved thermal stability, growth of biodegradable film technologies, and integration of smart monitoring features in industrial capacitors. The market is projected to grow at 7.2% CAGR (2023-2030), driven by renewable energy and 5G infrastructure demands.